disables a+a => 2*a

[r15671]

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index 62f43dd..bbfcc8e 100644 (file)
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -1912,6 +1912,8 @@ static ir_node *transform_node_Add(ir_node *n) {
                return n;
 
        if (mode_is_num(mode)) {
+#if 0
+               /* the following code ledas to endless recursion when Mul are replaced by a simple instruction chain */
                if (a == b && mode_is_int(mode)) {
                        ir_node *block = get_irn_n(n, -1);
 
@@ -1923,7 +1925,9 @@ static ir_node *transform_node_Add(ir_node *n) {
                                new_r_Const_long(current_ir_graph, block, mode, 2),
                                mode);
                        DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ADD_A_A);
-               } else if (get_irn_op(a) == op_Minus) {
+               } else
+#endif
+               if (get_irn_op(a) == op_Minus) {
                        n = new_rd_Sub(
                                        get_irn_dbg_info(n),
                                        current_ir_graph,